Artículos de revistas
Hydrophobic channels produced by micelle-structured CTAB inside MCM-41 mesopores: A unique trap for the hazardous hormone ethinyl estradiol
Fecha
2016-01Registro en:
Ribeiro Santos, Tatiana A.; Henriques, Fernando Fulgêncio; Villarroel Rocha, Jhonny; de Castro, Mateus Carvalho Monteiro; Magalhães, Welington Ferreira; et al.; Hydrophobic channels produced by micelle-structured CTAB inside MCM-41 mesopores: A unique trap for the hazardous hormone ethinyl estradiol; Elsevier Science Sa; Chemical Engineering Journal; 283; 1-2016; 1203-1209
1385-8947
CONICET Digital
CONICET
Autor
Ribeiro Santos, Tatiana A.
Henriques, Fernando Fulgêncio
Villarroel Rocha, Jhonny
de Castro, Mateus Carvalho Monteiro
Magalhães, Welington Ferreira
Windmöller, Dario
Sapag, Manuel Karim
Lago, Rochel Montero
Araujo, Maria Helena
Resumen
In this work, mesoporous hydrophobic cavities produced by a micelle structured CTAB (cetyl trimethylammonium bromide) trapped inside MCM-41 pores were used for the efficient removal of the hazardous hormone contaminant ethinyl estradiol (EE) present in water. The MCM-41 structure was prepared using different CTAB/Si molar ratios, i.e. 0.07, 0.12, 0.17, and 0.27. TG, SEM, TEM, BET, IR, elemental analysis, contact angle and positron annihilation spectroscopy showed that the MCM-41 silica structure is completely filled with trapped CTAB molecules (47-58wt%) which results in no porosity and very low surface areas of 1-5m2g-1. These materials showed high efficiency to remove EE from aqueous solution whereas pure MCM-41 (without CTAB) with high porosity and a surface area of 1333m2g-1 showed no adsorption. These results are discussed in terms of EE sorption into the hydrophobic environment created by the CTAB trapped molecules inside the mesoporous cavities of MCM-41.